1990 Cadillac Seville-4 dr

Very good condition. 116K miles. Had brakes replaced. Brake pedal went to the floor first day. Then came back. It's now been 2 months and brake pedal going to the floor again. Have not had to add any fluid to the master cylinder. Anybody have any ideas what is going on?

Reply to
snibble1
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Possibly a bad flexible brake line from frame to wheel? Also could be a bad master cylinder leaking past the piston. You could try taking the cover off the master cylinder and having someone push down on the brake pedal SLOWLY and see if you get bubbles.

There are MANY folks in this newsgroup smarter than me who might have a better idea. It's just the holiday weekend and they are all BBQ-ing.

Reply to
Bob D.

I've never seen it be anything but a bad master cylinder. Other possibilities, of course, but IMHO, not as likely. FWIW YMMV DFB

Reply to
MisterSkippy

Well, replaced master cylinder. Brakes are still low. In reading my repair book, it states to bleed the brakes in this order ONLY: right rear, left front, left rear, and THEN right front. I didn't realize that and bled them right rear, left rear, right front, left front....think if I do them again it would make a difference? I hadn't heard of this specific instruction before!

Reply to
snibble1

Your post got my interest. Just looked at the FSM, section 5-14, for my '93 Eldo and it calls for ....

1-Left front 2-Right front 3-Left rear 4-Right rear for either manual bleed or pressure bleed.

The last brake job I did was on my old Econoline and that called for the same sequence you used.

Reply to
MisterSkippy

No laughing....what's a "pressure bleed"?

Reply to
snibble1

A Pressure bleeder uses brake fluid under pressure to bleed the brakes. Just open the bleeder valve and fluid comes flowing out great for 1 person bleeding.

Reply to
Curtis

Reply to
donji

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